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Tantalum
Tantalum

Thulium
Thulium



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Tantalum
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Thulium

Atomic Structure of Tantalum and Thulium

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1 Atomic
1.1 Atomic Number
7369
3 117
1.2 Electron Configuration
[Xe] 4f14 5d3 6s2
[Xe] 4f13 6s2
1.3 Crystal Structure
Body Centered Cubic (BCC)
Hexagonal Close Packed (HCP)
1.3.1 Crystal Lattice
1.4 Atom
1.4.1 Number of Protons
7369
3 117
1.4.2 Number of Neutrons
108100
4 184
1.4.3 Number of Electrons
7369
3 117
1.5 Radius of an Atom
1.5.1 Atomic Radius
146.00 pm176.00 pm
112 265
1.5.2 Covalent Radius
170.00 pm160.00 pm
96 260
1.5.3 Van der Waals Radius
200.00 pmNA
139 348
1.6 Atomic Weight
180.95 amu168.93 amu
6.94 294
1.7 Atomic Volume
10.90 cm3/mol18.10 cm3/mol
1.39 71.07
1.8 Adjacent Atomic Numbers
1.8.1 Previous Element
1.8.2 Next Element
1.9 Valence Electron Potential
110.00 (-eV)49.70 (-eV)
8 392.42
1.10 Lattice Constant
330.13 pm353.75 pm
228.58 891.25
1.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
1.12 Lattice C/A Ratio
NA1.57
1.567 1.886